No check engine lights, but misfires at idle on cyl 2,3 and 4 in logger. I've been going nuts trying to find a vac leak because of a/f learning #1 0-5.6 in learning view being high (occasionally 15), but smoke test found nada.
I'm due for plugs, maybe 50k on them... MAF sensor was cleaned with electrical parts cleaner very lightly... car does sound noisier under the hood than ever before since my woes began a couple months ago, I hope it isn't valves!
I'll be pulling out my two front plugs, cyl 1 has shown no misfire so I'll compare it to any other easily accessible plugs since the rest are misfiring. If they're good, I'll swap cyl 1 injector to anywhere else and see if cyl 1 starts misfiring, or the swapped cyl stops misfiring.
Leakdown and compression test hopefully done next wednesday. If it's anything more than plugs and injectors I'm getting an f'n new KIA and washing my hands clean of LGT/defeat.